<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>

    <!-- cden引入 -->
    <script src="https://unpkg.com/vue@next"></script>
    <script>

        //1.创建一个对象
        const obj = {
            template: '<h1>hello world!!!</h1>'
        }
        const app = Vue.createApp(obj)   //2.接受一个对象
        app.mount("#app")  //3.通过mount挂载到div

    </script>
</body>
</html>